truncate words, also called 'stemming': *. Can be used in front of, or at the end of a search term. Example erasm* finds Erasmus, Erasme, Erasmian, etc. *sopus fins both Aesopus and Esopus The search term itself should have at least 3 characters..

grouping: between brackets. Example miller (henry|arthur) finds both Henry and Arthur Miller, but no other Millers.

you can use combinations: "south africa"|"south-africa"or concord* -(*plane|place): concord(e), but not the (aero)plane and also not Place de la Concorde.

Advanced search: searches the different fields. The feature mentioned above are also possible.